A Fully-Implantable Mems-Based Autonomous Cochlear Implant

Külah, Haluk
Ulusah, Hasan
Chamanian, Salar
Yüksel, Muhammed Berat
Yılmaz, Ali Özgür
Koyuncuoglu, Aziz
Soydan, Alper K.
© 2022 IEEE.This paper reports a fully implantable, MEMS-based, low-power, energy harvesting, next generation cochlear implant (CI). The implant includes multi-frequency piezoelectric transducers for sound detection and energy harvesting, rectification and signal conditioning electronics, and RF coil for fitting and external powering. These units have outstanding performances: multi-channel transducer can generate 50.7 mVpp (under 100 dB SPL) and recover the daily sound speech signals; signal conditioning IC consumes outstandingly low power (<500 W) while converting outputs signals of the transducer to biphasic pulses; piezoelectric energy harvester has the highest power density (1.5 × 10-3 W/cm3) with generated 16.25 W under 120 dB-A sound input; energy harvester IC, provides up to 500% more power compared to an ideal full-bridge rectifier.
35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022


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This paper presents an ultra-low power interface circuit to stimulate auditory nerves through fully-implantable cochlear implants (FICIs). The interface circuit senses signals generated from a multi-frequency piezoelectric sensor array, and generates neural stimulation current according to input sound level. Firstly, piezoelectric sensor output is amplified, and compressed with an ultra-low power logarithmic amplifier (LA). This significantly reduces power by eliminating the compression in the next stages. ...
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Citation Formats
H. Külah et al., “A Fully-Implantable Mems-Based Autonomous Cochlear Implant,” Tokyo, Japonya, 2022, vol. 2022-January, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126396114&origin=inward.